单项选择题

The most probable position of the object of a search at any given time is the（）.

A.datum
B.estimated position
C.search point
D.initial point

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The key to rescuing a man overboard is（）.

A.good communication
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C.good equipment
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单项选择题

The indication of a slipping anchor is a(n)（）.

A.decrease in mooring line length
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单项选择题

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A.deck lights forward and aft
B.a white light over two red lights
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D.a distinctive signal promulgated by the CSS